Service Manual

SH1 BOARD IC1 01 SHJ CPU
"
IC CUSTOM CHIP SHi QFP
Parts No.: 315-5785
•Top View
112
28
29
• Description
No.
I
1/0
I
i
2
3
I
4
s
6
7
I
I/0
8
9
10
11
12
-
13
I/0
14
15
-
16
17
18
1/0
19
20
21.
22
-
23
24
2S
.
26
0
27
28
29
30
31
-
32
33
34
3S
0
36
37
38
39
40
-
41
0
42
43
-
44
45
0
46
47
48
0
49
0
IC CUSTOM CHIP SH1 A QFP
Parts No. : 3l5-5785A
85
56
Pin Name
Function
IROL
Host command intenupt input (level detection)
IRQH
CD-ROM sync detection, subcode sync detection intenupt input (level detection)
VSS Ground
ADO
ADI
ADZ
AD3
Data input/output
AD4
ADS
AD6
AD7
VSS Ground
ADS
Data input/output
AD9
vee +SV
AD10
AD11
AD12
Data input/output
AD13
AD14
ADIS
VSS Ground
AO
A1
A2
A3
Address output
A4
AS
A6
A7
VSS Ground
A8
A9
AIO
All
Address output
A12
Al3
AI4
AIS
vss
Ground
AI6
Address output
Al7
vee
+5V
AI8
Al9
Address output
A20
A21
NC
Not connected.
CASH
DRAM CASH output
-63-